. >> reporter: the judge's conditions for gavin taylor to be released pending trial for a narcotics arrest included the order he not engage in any criminal conduct. but one month later, prosecutors say this is tail taylor on a ride on bus in silver spring positions himself to sit behind the man he would rob at kni point. it was christmas eve. >> this young man essentially went on a violent crime spree after he had been given many opportunities to reform his life. >> reporter: a mile away in silver spring, the very next day, christmas day, prosecutors say taylor had a femalell frien cab but when the taxi arrived, taylor wearg a ski mask got in and assaulted the driver with what are described as brass knuckles with abl shar e attached and robbed him. >> now he's back in the system and the judge decided to give him a stiff sentence on these violent crimes. >> introduced as evidence against taylor whom authorities describe as a gang member,ec prors produced a jailhouse phone call in which they allege he urges a friend who help himt intimi female witness. >> knows she just pickedon the person.